Re: Limit on number of APs? Some way to force-rescan?

["Robo Blaster" <ijustmadethisup mail com>]

It would be nice if opening the scan list triggered a rescan. In crowded AP areas, I often have problems getting connected. A contributing problem is that AP_SCAN always equals 1 if the ssid is in the scan list. A new scan is taken, my AP isn't there (usually), and it waits, scans again, and times-out. Shouldn't it rescan quicker and eventually try AP_SCAN=2 before the timeout? At least if I click "Connect to Other Wireless Network" and re-enter credentials I should get a directed scan, but if the ssid hasn't aged out of the drop-down list, it will still scan and look for an ssid match.

It looks like the scan list returns 15 APs, so in an area of 25-50 APs, a directed scan will often be required.

-Robbo


> ----- Original Message -----
> From: "Derek Atkins" <warlord MIT EDU>
> To: networkmanager-list gnome org
> Subject: Limit on number of APs?  Some way to force-rescan?
> Date: Wed, 12 Jul 2006 13:35:16 -0400
> 
> 
> I'm sitting here in the IETF, and from where I sit I can hear at least
> 15 Access Points, some A, some B/G.  I get this number by manually
> running "iwlist ath0 scan" and looking at the results.  I see
> "three" ESSIDS:
> 
> [warlord cliodev ~]$ iwlist ath0 scan | grep ESSID | sort -u
>                      ESSID:""
>                      ESSID:"IETF66A"
>                      ESSID:"IETF66B"
> 
> However, nm-applet is only showing IETF66B, and wont let me connect to
> IETF66A, even when I tell it to by "Connect to other wireless
> network".
> 
> Now, going back to my scan-list, the IETF66A network doesn't show
> up until "Cell 10" in my scan list.   Is there some limit to the
> number of returns from a scan?  Does NM stop looking after some
> point?
> 
> Right now I can't figure out how to tell it to connect to the A
> network.  I can see it's there, but NM doesn't see it.  I've tried
> restarting NM to no avail.  I haven't tried rebooting, but honestly I
> shouldn't have to.  Is there some way to tell NM: "Hey, I know there's
> more networks out there -- can you go look again right now?"
> 
> Any suggestions of things to try?  I suspect that my situation will
> change in an hour when I move to another room.
> 
> -derek
> 
> PS: Why do I feel like I really stress test both Madwifi and NM all
> the time with my personal usage patterns???
> 
> --
>         Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
>         Member, MIT Student Information Processing Board  (SIPB)
>         URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
>         warlord MIT EDU                        PGP key available
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>


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